Re: USB problem on beagleboard clone

[Felipe Balbi <balbi-l0cyMroinI0@public.gmane.org>]

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On Fri, Sep 14, 2012 at 03:21:47PM +0200, Maximilian Schwerin wrote:
> Hi,
> 
> > -----Ursprüngliche Nachricht-----
> > Von: Felipe Balbi [mailto:balbi-l0cyMroinI0@public.gmane.org] 
> > Gesendet: Freitag, 14. September 2012 15:08
> > An: Maximilian Schwerin
> > Cc: linux-omap-u79uwXL29TY76Z2rM5mHXA@public.gmane.org; linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
> > Betreff: Re: USB problem on beagleboard clone (PGP: Plain, 
> > Unable to verify signature)
> > 
> > Hi,
> > 
> > On Fri, Sep 14, 2012 at 02:57:49PM +0200, Maximilian Schwerin wrote:
> > > Sorry :-( With log now.
> > > 
> > > > -----Ursprüngliche Nachricht-----
> > > > Von: linux-usb-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org 
> > > > [mailto:linux-usb-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org] Im Auftrag von 
> > > > Maximilian Schwerin
> > > > Gesendet: Freitag, 14. September 2012 14:26
> > > > An: linux-omap-u79uwXL29TY76Z2rM5mHXA@public.gmane.org; linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
> > > > Betreff: USB problem on beagleboard clone (PGP: Plain, Signed)
> > > > 
> > > > Hi all,
> > > > 
> > > > we've designed two beagle board clones (two different 
> > > > layouts) for a customer. After quite some time without any 
> > > > problems they are now seeing USB problems on some of the 
> > > > boards. I have so far not been able to reproduce the problem...
> > > > 
> > > > The USB port of the OMAP the problems appear on is connected 
> > > > through a TPS65950 to a LAN9514 USB Hub + Ethernet Chip. 
> > > > Attached is the kernel output. I'm not even sure if this is 
> > > > related to our board, or if this might be a misbehaving device?!
> > > > 
> > > > If someone has an idea what this could be and what I could do 
> > > > to fix or at least further debug the problem please speak up.
> > 
> > I have never seen that error before on any of the boards I have. One
> > question though, if the port is always Host, why are you using the OTG
> > subsystem instead of the actual Host Subsystem which has an EHCI
> > controller ?
> > 
> > -- 
> > balbi
> > 
> 
> I'm still on 3.3 but am planing to go to a newer version. We used the
> OTG port so we would not need another chip on a rather small board.

And which chip are you talking about ? You already have LAN9514 on your
board anyway...

-- 
balbi

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